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Wave powered desalination

Desalination on a small scale is being testing using a low-cost device powered by ocean waves. It can produce enough water per day to be useful in emergencies or to provide water to small communities, plus it is small and completely self-sufficient. “Small scale desalination for people who really need it,” says a co-developer in the video. It will sell for about $23,000 and can produce upwards of 2,000 gallons of water per day. It is deliberately designed so users can make any needed adjustments using just a wrench.

Called the Swell Actuated Reverse Osmosis System – SAROS for short – it uses high-pressure pumps powered by the vertical motion of waves to remove salt from ocean water, making it fit for human consumption. The founders believe SAROS could be used to address fresh water shortages in coastal areas, island communities, and after natural disasters when regular water purification systems are disrupted.

“It’s never going to be something that’s going to make tons of money, but we just want to see it make tons of water,” Sonnett says.